# Metric System - Definition with Examples

## Let's learn!

**What is the metric system?**

The standard units (SI) for measuring length are kilometers, meters and centimeters; weight are kilograms, grams and milligrams, volume are liters, and milliliters.

**Length:**Millimeter (mm), Decimeter (dm), Centimeter (cm), Meter (m), and Kilometer (km) are used to measure how long or wide or tall an object is.

**Weigh**t

**:**Gram (g) and Kilogram(kg) are used to measure how heavy an object, using instruments. Examples include measuring weight of fruits or, our own body weight.

**Capacity:**Milliliter (ml) and Liter (l) are used to measure how much quantity of liquid an object can hold. Examples include measuring the amount of juice in a juice can, or amount of water of in a water tank.

**Metric Conversions:** Meters, grams and liters are considered the base units of length, weight and volume, respectively.

Here’s how we can multiply or divide for making metric conversions. To convert a bigger unit to the smaller unit, we move left to write, we multiple by 10. Moving right to left, from smaller unit to bigger, we divide by 10.

## Let's sing!

*Find a millimeter in a pencil tip,*

*Find a centimeter in big paper clip.*

*Find a millilitre in the juice you drink,*

*Find a liter in the water filled in the sink.*

*Find a gram in the mango you ate,*

*Find a kilogram in it’s packet of eight!*

## Let's do it!

## Related math vocabulary

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